Why do I get an error message on my TI-89 when I try to take the log of very small numbers?

Question

For some reason, I have been getting an error message when I have tried to take the log of a very small number on my TI-89 Titanium graphing calculator. For example, when I try to compute the log of (2 x 10^-9) on my TI-89 Titanium, I get an error message that reads "Name is not a function or program." However, when I enter the EXACT same expression into a TI-84, it displays "-8.69897," which is the correct answer. Why am I getting an error message when I try to do this calculation with my TI-89, and how can I fix this??

Answer 1

I tired it on my TI-89 titanium and did not get an error. First question is how exactly are you entering the calculation? are you using LN above x button? or are you using log(2*10^-9)?



All I can say without further details is that the error is usually because you type the name of a function wrong, normally this would happen when you are trying to use a program or function that you made yourself and mispell it. If you want you can message or e-mail me with more details and I can help you further.

Answer 2

those 2 equations are in simple terms horizontal strains. Is that what you had to do? I doubt it. I in simple terms did a attempt with my TI-80 3. which could artwork. you're able to set your window first. whilst i attempted to apply zoom selection 0 "ZoomFit", I have been given the comparable blunders. Use zoom selection 6, 'ZStandard' to start and then use the window button to set the window the way you desire.

Answer 3

Nope. Selected from the catalog of functions. Still get the "name is not a function" error. How 'bout the function from your catalog? is that a function? Isn't a function a function when I select it from the catalog?



This isn't user error, this is a glitch. When it comes to log functions, the Ti-89 is a glitch *****